Search found 105 matches

by BasilF
Thu Oct 15, 2020 4:09 pm
Forum: Tech
Topic: 1974 tr5mx Engine Mounting Bolts
Replies: 7
Views: 284
Flag: Great Britain

Re: 1974 tr5mx Engine Mounting Bolts

Draganfly and PES in the UK both have them (21-2160) in stock. BSAUNITSINGLES in the US list them as in stock. Easy enough to make one but the plating charge for one bolt could be an issue.
by BasilF
Wed Oct 14, 2020 10:40 pm
Forum: Tech
Topic: 1974 tr5mx Engine Mounting Bolts
Replies: 7
Views: 284
Flag: Great Britain

Re: 1974 tr5mx Engine Mounting Bolts

There must be lots of bolt suppliers with UNF bolts in the USA. See chart below to find out what length you need. Plain section should go through both lugs.
ScrewBolt_HexHd_UNFine_THRpart.pdf
(101.37 KiB) Downloaded 11 times
by BasilF
Wed Oct 07, 2020 7:02 am
Forum: Parts & Bikes wanted
Topic: Electrical Box Mounting
Replies: 10
Views: 465
Flag: Great Britain

Re: Electrical Box Mounting

The front mounting bracket for the later rubber grommet mounts is available in stainless steel from Classic Bike Parts https://classicbikepartsuk.uk/product/bsa-b50-electric-box-mounting-brackets-83-3813-83-3814/ If you can't get shouldered bolts the 1/4unf bolts with the Spacer - headlamp mounting ...
by BasilF
Fri Oct 02, 2020 9:59 pm
Forum: Tech
Topic: TR5mx Fork/Steering Stem
Replies: 16
Views: 686
Flag: Great Britain

Re: TR5mx Fork/Steering Stem

Its threaded both ends, a course thread into the bottom yolk and a fine thread into the bearing adjusted nut. Heating the bottom yolk will certainly help if it is tight.
by BasilF
Fri Aug 28, 2020 3:55 pm
Forum: Tech
Topic: B25SS exhaust pipe
Replies: 11
Views: 745
Flag: Great Britain

Re: B25SS exhaust pipe

IMG_20200826_174856~2.jpg
Here is a photo. Cut and shut was half way round the front bend.
by BasilF
Fri Aug 28, 2020 3:32 pm
Forum: Tech
Topic: B25SS exhaust pipe
Replies: 11
Views: 745
Flag: Great Britain

Re: B25SS exhaust pipe

I had the same problem with the b50 pipe I recently bought. Tightening the front bend would have stopped it fitting through the frame at the back so I cut about 15mm out of the vertical part of the front bend and then welded it back together. To be fair, it is a bastard of a pipe to make compared wi...
by BasilF
Wed Aug 26, 2020 10:21 pm
Forum: Project bikes
Topic: My B50SS
Replies: 53
Views: 13844
Flag: Great Britain

Re: My B50SS

Mikuni is an option. Does the Mikuni (VM?) fit to the existing air cleaner and do you have the correct jetting.
by BasilF
Wed Aug 26, 2020 6:45 pm
Forum: Project bikes
Topic: My B50SS
Replies: 53
Views: 13844
Flag: Great Britain

Re: My B50SS

Had a few rides now and it is as much fun as I remembered from 1972. I've posted elsewhere about my registration and short circuit problems. New lithium battery is behaving well and terminals are more recessed than original. IMG_20200813_093009.jpg Last ride produced a new problem with a sticking ca...
by BasilF
Wed Aug 26, 2020 6:34 pm
Forum: Tech
Topic: Lozenge Silencer
Replies: 6
Views: 839
Flag: Great Britain

Re: Lozenge Silencer

Had a go at making a new lozenge silencer as a spare for my B50/ IMG_20200716_114704.jpg Made a wooden buck from the measurements of an original silencer. To get a more curved shape, rather than fold a channel and then make the ends into a lozenge I made a top and then sides and welded them all toge...
by BasilF
Fri Aug 21, 2020 11:09 am
Forum: Tech
Topic: Cooked battery
Replies: 11
Views: 725
Flag: Great Britain

Re: Cooked battery

Solved. A heat shrinked part of the positive battery lead was close to the battery carrier and touched it due to vibration when the bike was pulling at low revs. The battery carrier is rubber mounted but obviously touches the frame somewhere because it is connected to earth. Once the heat shrink and...
by BasilF
Wed Aug 19, 2020 1:27 pm
Forum: Tech
Topic: Cooked battery
Replies: 11
Views: 725
Flag: Great Britain

Re: Cooked battery

Trawling through YouTube, 14.5volts seems a very common voltage for motorcycle rectifier/regulators. There also seems to be consensus that about 14volts is the maximum that should be fed to a fully charged lead acid battery if you aren't going to damage it eventually. I can't see a satisfactory solu...
by BasilF
Tue Aug 18, 2020 6:26 pm
Forum: Tech
Topic: Cooked battery
Replies: 11
Views: 725
Flag: Great Britain

Cooked battery

I went for my first long ride today and had to turn back early due to a misfire. Got home and found the battery was boiling. The battery was known to be quite old and not well charged before the ride. I have a podtronics rectifier regulator fitter but no 2MC capacitor. I've fitted a voltmeter and th...
by BasilF
Thu Aug 13, 2020 6:48 pm
Forum: Tales Of Woe
Topic: Registering an historic BSA
Replies: 9
Views: 1644
Flag: Great Britain

Re: Registering an historic BSA

IMG_20200813_085323.jpg End of the saga. Got a probably illegal number plate (Slocombes of Neasden was the dealer who sold me my first B50 in 1972). Took the bike out for its first road ride and it ran well. Only an intermittent speedo (dodgy cable) and poor front brake (cable needed lube) needed f...
by BasilF
Thu Aug 06, 2020 7:55 am
Forum: Tales Of Woe
Topic: Registering an historic BSA
Replies: 9
Views: 1644
Flag: Great Britain

Re: Registering an historic BSA

After the rejection I wrote back on 24th June Saying that ; 1 In 2014 when it was imported, a title document didn't seem to be a requirement. 2 The motorcycle was a wreck when bought and in all probability hadn't been registered for road use in 30 years so was unlikely to have had an American title ...
by BasilF
Tue Jun 23, 2020 2:26 pm
Forum: Tales Of Woe
Topic: Registering an historic BSA
Replies: 9
Views: 1644
Flag: Great Britain

Registering an historic BSA

My long delayed application for an historic registration for my US import B50 came back rejected today. I thought that the letter from HMRC saying all import taxes had been paid, together with dating certificate and correct application form would be enough but they are asking for "the original non-U...
by BasilF
Fri Jun 19, 2020 6:44 am
Forum: Tech
Topic: Engine Builder
Replies: 7
Views: 1128
Flag: Great Britain

Re: Engine Builder

If you are going to do it yourself then Rupert Ratio's book is a great help.

http://www.ratiopublishing.co.uk/The-Ru ... l-Volume-1
by BasilF
Sun Jun 07, 2020 8:14 am
Forum: Tech
Topic: Lozenge Silencer
Replies: 6
Views: 839
Flag: Great Britain

Re: Lozenge Silencer

Can't give an exact answer but my new silencer is made of 1.5mm steel and it was only slightly heavier than the original one so 1.2 or 1.5mm ought to be fine for your patch and 1.5mm will be easier to weld.
by BasilF
Fri May 22, 2020 2:16 pm
Forum: Tech
Topic: pattern tricon switch
Replies: 11
Views: 1251
Flag: Great Britain

Re: pattern tricon switch

Sounds like they used annealed copper to make the contacts. If you could remove the contacts and spend a few minutes taping them with a hammer you might give them enough springiness to work properly.
by BasilF
Tue May 19, 2020 11:24 am
Forum: Tech
Topic: Tyres
Replies: 10
Views: 1215
Flag: Great Britain

Re: Tyres

I've put Dunlop K81/TT100 on mine as they were what I fitted in 1975 and they are still available.
by BasilF
Thu May 14, 2020 5:24 pm
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 55
Views: 5544
Flag: Great Britain

Re: B25 SS CV19 project

minetymenace wrote:
Thu May 14, 2020 5:11 pm
JerryT that tank has the brackets for the brace....
Jerry.

https://www.b50.org/phpBB2/viewtopic.php?f=14&t=5589. 28 August 2019
Well it would do. I did both tanks at the same time. I also have the brace which you can have if you want it.
by BasilF
Thu May 14, 2020 6:43 am
Forum: Parts & Bikes wanted
Topic: 1970 OIF B25 parts.
Replies: 6
Views: 1101
Flag: Great Britain

Re: 1970 OIF B25 parts.

JerryT wrote:
Tue May 12, 2020 9:44 pm
83-2013. Swinging arm spindle. I have a loose snail cam.
A new snail cam is £7 from Draganfly.. Weld it on to the old spindle and send it for zinc plating when you have a batch to do. Should come out much cheaper than a new spindle.
by BasilF
Wed May 13, 2020 7:38 am
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 55
Views: 5544
Flag: Great Britain

Re: B25 SS CV19 project

Here is my Leightons repaired seat and the chuck I hacked off the seat base before recover. Whatever he did with the foam, it seems wide enough at the front.
IMG_20200513_073424.jpg
by BasilF
Fri May 08, 2020 10:52 pm
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 55
Views: 5544
Flag: Great Britain

Re: B25 SS CV19 project

Jerry,
R K Leighton is in Birmingham. My bank account shows I paid £144 while a new seat with a glass fibre base is £175 I think. The £144 included some welding on the base, new foam and a cover.
by BasilF
Fri May 08, 2020 3:46 pm
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 55
Views: 5544
Flag: Great Britain

Re: B25 SS CV19 project

I met Rupert Ratio at a bike show at the NEC. He said that for the large tanks the factory just cut an inch or so from the front of the seat pan. They also cut a similar slice out of the parallel section of the foam and then glued the halves together. I cut the front off mine before taking it to Lay...
by BasilF
Thu May 07, 2020 2:01 pm
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 55
Views: 5544
Flag: Great Britain

Re: B25 SS CV19 project

For the seat, R K Leighton. www.rk-leighton.co.uk did a briliant job on mine including getting the base welded and powder coated.
by BasilF
Thu May 07, 2020 6:44 am
Forum: Tech
Topic: Front Brake Plate ??'s
Replies: 1
Views: 591
Flag: Great Britain

Re: Front Brake Plate ??'s

Which brake? Twin leading shoe would become twin trailing shoe and work poorly. Small brake should work OK but make sure the torque anchor is in tension not compression.
by BasilF
Mon May 04, 2020 6:48 am
Forum: Project bikes
Topic: 74 TR5 MX Project For Ken
Replies: 95
Views: 9673
Flag: Great Britain

Re: 74 TR5 MX Project For Ken

Johnu,

Would be interested to hear about your pipe bending technique. I can see you hot bend, Do you fill with sand, bend round a former etc? All my attempts result in the tube flattening even when it doesn't buckle.
by BasilF
Sat May 02, 2020 4:46 pm
Forum: Tech
Topic: B50MX cam in a B25 and Big bore ideas.
Replies: 10
Views: 1450
Flag: Great Britain

Re: B50MX cam in a B25 and Big bore ideas.

My B23 engine is on the bench at the moment. It looks like, without modification to the crankcase, you could machine the barrel out to take a 79mm od sleeve with a 75mm bore. giving about 313cc.
IMG_20200502_164419.jpg
IMG_20200502_164442.jpg
by BasilF
Sat May 02, 2020 11:03 am
Forum: Project bikes
Topic: My B50SS
Replies: 53
Views: 13844
Flag: Great Britain

Re: My B50SS

Perhaps slightly quieter than the original. Only ridden it in first and second gear down private road so don't know if top end performance is ok. Brakes seem terrible but I'll wait till I've run them in a bit before panicking.
by BasilF
Thu Apr 30, 2020 4:21 pm
Forum: Project bikes
Topic: My B50SS
Replies: 53
Views: 13844
Flag: Great Britain

Re: My B50SS

IMG_20200420_120203.jpg IMG_20200418_123352.jpg IMG_20200430_160601.jpg IMG_20200424_122852.jpg IMG_20200430_153159.jpg Lozenge silencer using one of Jerry's cases. bend in outlet pipe flattened in spite of packing with sand and heating to dull red. Nice heat shield is one is Jerry's. I think the b...
by BasilF
Thu Apr 30, 2020 3:45 pm
Forum: Tech
Topic: B25 piston
Replies: 15
Views: 1846
Flag: Great Britain

Re: B25 piston

IMG_20200430_151747.jpg
16945 is the part number, 413 is the material, don't know what 1B74 or G1 are. My cheap Vernier calipers won't give an accurate diameter of the bore or piston (anything from 67 to 67.5.)
by BasilF
Wed Apr 29, 2020 10:45 pm
Forum: Tech
Topic: B25 piston
Replies: 15
Views: 1846
Flag: Great Britain

Re: B25 piston

Thanks for the replies. The issue at the moment is if I decide to fit new rings then where do I get them from. Also the bore seems to be 10 thou over size while standard BSAs are 20, 40 and 60. Searching through the web it seems there are several vendors offering Hepolite pistons for B25s and the ri...
by BasilF
Wed Apr 29, 2020 4:56 pm
Forum: Tech
Topic: B25 piston
Replies: 15
Views: 1846
Flag: Great Britain

B25 piston

IMG_20200429_162626.jpg
IMG_20200429_162633.jpg
Is this the standard piston for a 1971 B25? None of the illustrations I can find show a split skirt. There appears to be no markings for front and back. There is also a small witness mark on the crown where the sparkplug may have been touching it.
by BasilF
Sun Apr 26, 2020 11:00 am
Forum: Tech
Topic: B50 Frame number picture
Replies: 2
Views: 630
Flag: Great Britain

Re: B50 Frame number picture

IMG_20200329_154553.jpg
Not that visible on photo after powder coating. I have a better one that was taken when the frame was stripped.
by BasilF
Sat Apr 25, 2020 6:20 pm
Forum: Tech
Topic: Zener diode
Replies: 18
Views: 1594
Flag: Great Britain

Re: Zener diode

Voltage regulators are available from Draganfly, Burton bike bits and several eBay vendors. If your alternator has two wires then you want the single phase, 120 watts model although the slightly more expensive 200watt one won't do any harm. I've got a 40 year old zener diode in my junk box which che...
by BasilF
Thu Apr 16, 2020 1:08 pm
Forum: Parts & Bikes wanted
Topic: breather pipe
Replies: 8
Views: 1044
Flag: Great Britain

Re: breather pipe

Mine is a press fit into the chain case. We're the later ones threaded into the case?.
The answer might be to find someone locally with a lathe. Not a difficult part to make.
by BasilF
Wed Apr 15, 2020 10:48 pm
Forum: Parts & Bikes wanted
Topic: breather pipe
Replies: 8
Views: 1044
Flag: Great Britain

Re: breather pipe

I bought a metre of this from Ebay. Fitted fine but unfortunately not available in grey. Size was 13mm id 18mm od. https://www.ebay.co.uk/itm/1-Metre-Silicone-Rubber-Vacuum-Hose-Turbo-Radiator-Coolant-Vac-Silicon-Tubing-UK/140665187714?ssPageName=STRK%3AMEBIDX%3AIT&var=440036540610&_trksid=p2057872....
by BasilF
Tue Apr 07, 2020 6:36 pm
Forum: Tech
Topic: Welding to oil tank.
Replies: 1
Views: 493
Flag: Great Britain

Re: Welding to oil tank.

Tacked the first side on and nothing caught fire.
IMG_20200407_181718.jpg
by BasilF
Tue Apr 07, 2020 4:36 pm
Forum: Tech
Topic: Welding to oil tank.
Replies: 1
Views: 493
Flag: Great Britain

Welding to oil tank.

Just starting new project and the first job is to weld new brackets for the front electrical box mounts. These are welded to a frame tube that is part of the oil tank. Oil is drained but tank not cleaned out. Will I have problems with smoke/fire or will I get away with it?
by BasilF
Mon Apr 06, 2020 5:32 pm
Forum: Tech
Topic: Front Brake Stay/Fork?
Replies: 19
Views: 1824
Flag: Great Britain

Re: Front Brake Stay/Fork?

Part number 20-0104